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Photosynthetic response of Tempranillo grapevine to climate change scenarios
Author(s) -
SalazarParra C.,
Aguirreolea J.,
SánchezDíaz M.,
Irigoyen J.J.,
Morales F.
Publication year - 2012
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.2012.00572.x
Subject(s) - photosynthesis , veraison , ripeness , biology , botany , stomatal conductance , rubisco , transpiration , carbon fixation , photosynthetic capacity , ecophysiology , horticulture , vitis vinifera , ripening
Photosynthesis in C 3 plants is CO 2 limited and therefore any increase in Rubisco carboxylation substrate may increase net CO 2 fixation, unless plants experience acclimation or other limitations. These aspects are largely unexplored in grapevine. Photosynthesis analysis was used to assess the stomatal, mesophyll, photochemical and biochemical contributions to the decreasing photosynthesis observed in Tempranillo grapevines ( Vitis vinifera ) from veraison to ripeness, modulated by CO 2 , temperature and water availability. Photosynthesis and photosystem II photochemistry decreased from veraison to ripeness. The elevated CO 2 and temperature increased photosynthesis, but transiently, in both well irrigated (WI) and water‐stressed plants. Photosynthetic rates were maxima 1 week after the start of elevated CO 2 and temperature treatments, but differences with treatments of ambient conditions disappeared with time. There were not marked changes in leaf water status, leaf chlorophyll or leaf protein that could limit photosynthesis at ripeness. Leaf total soluble sugars remained at ripeness as high as 2 weeks after the start of treatments. On the other hand, and as expected, CO 2 diffusional limitations impaired photosynthesis in grapevine plants grown under water scarcity, stomatal and mesophyll conductances to CO 2 decreased and in turn low chloroplastic CO 2 concentrations limited photosynthetic CO 2 fixation. In summary, photochemistry and photosynthesis from veraison to ripeness in Tempranillo grapevine were dominated by a developmental‐related decreasing trend that was only transiently influenced by elevated CO 2 concentrations.